PFG – Journal of Photogrammetry Remote Sensing and Geoinformation Science, Journal Year: 2023, Volume and Issue: 92(4), P. 431 - 447
Published: Oct. 4, 2023
Language: Английский
Frontiers in Remote Sensing, Journal Year: 2024, Volume and Issue: 4
Published: Feb. 8, 2024
Since 2021, two autonomous HYPERNETS (A new hyperspectral radiometer integrated in automated networks of water and land bidirectional reflectance measurements for satellite validation) stations are operated contrasted French coastal waters: one the center an optically complex lagoon at mouth a highly turbid estuary. These perform predefined sequences above-water radiometric following strict viewing geometry. The data recorded by ®HYPSTAR is automatically transmitted to servers quality-controls then computation water-leaving signal. Numerous matchups were identified with high (Sentinel2-MSI Landsat8/9-OLI) medium (Sentinel3-OLCI Aqua-MODIS) spatial resolution analyzed assess performance different atmospheric correction algorithms (Sen2Cor, ACOLITE, POLYMER, iCOR, C2RCC, GRS, BPAC, NIR-SWIR). Considering specifications each site (i.e., temporal variations optical properties), optimized matchup protocols first established guaranty quality comparisons between products field measurements. results highlight failure limits several complex/turbid waters. importance accurate sun glint corrections low moderately-turbid waters (with good performances C2RCC GRS processors, e.g., errors (MAPE) lower than 25% green spectral region) also shown while use dark targets fitting estimate aerosol contributions proved be most method case Sen2Cor ACOLITE 20% visible near-infrared regions).
Language: Английский
Citations
4
Remote Sensing Applications Society and Environment, Journal Year: 2025, Volume and Issue: unknown, P. 101531 - 101531
Published: March 1, 2025
Language: Английский
Citations
0
The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 978, P. 179391 - 179391
Published: April 16, 2025
The Mar Menor is a hypersaline coastal lagoon in the southeast of Spain, which has experienced several eutrophication episodes recent years. In 2022, an area milky white turbid water appeared covering about 10 % its surface, and it been there ever since. A comprehensive field research was set up to assess origin this possible whiting event, including identification continental inputs, satellite imagery analyses physico-chemical properties column, sediment, planktonic benthic communities. Our observations indicate that turned due precipitation authigenic (formed where currently located) calcite as described events occurring other marine areas. addition very high turbidity, affected showed increased nutrient chlorophyll concentrations compared rest lagoon. altered conditions also communities led complete disappearance previously abundant vegetation (Caulerpa prolifera), thus influencing biogeochemical cycles. Satellite images coupled with sediment core analysis suggest appears have begun unprecedented Menor. enhanced alkalinity semi-enclosed nature lagoon, along inflow may be producing favorable for calcium carbonate supersaturation since rising groundwater levels adjacent aquifer seem intensified discharge, contains HCO3-. This rise likely long-term increase recharge, induced by expansion irrigation practices, combination oscillations rainfall
Language: Английский
Citations
0
Remote Sensing, Journal Year: 2022, Volume and Issue: 14(10), P. 2345 - 2345
Published: May 12, 2022
Estuarine degradation is a major concern worldwide, and rapidly increasing due to anthropogenic pressures. The Mediterranean Guadiaro estuary, located in San Roque (Cadiz, Spain), an example of highly modified showing severe negative effects eutrophication episodes beach erosion. migration its river mouth sand spit causes the closure resulting serious water quality issues flora fauna mortality lack renewal. With aim studying estuary throughout 4-year period (2017–2020), Sentinel-2 A/B twin satellites Copernicus programme were used thanks their 5-day 10 m temporal spatial resolution, respectively. Sea–land mapping was performed using Normalized Difference Water Index (NDWI) Google Earth Engine (GEE) platform, selecting cloud-free Level 2A images computing statistics. Results show trend no clear seasonal patterns. study also reveals potential both GEE for estuarine monitoring by means optimized processing workflow. This improvement will be useful coastal management ensure continuous detailed area, contributing development early-warning tools, which can helpful supporting ecosystem-based approach areas.
Language: Английский
Citations
18
Marine Pollution Bulletin, Journal Year: 2023, Volume and Issue: 192, P. 115074 - 115074
Published: May 24, 2023
The Mar Menor hypersaline coastal lagoon has suffered serious degradation in the last three decades attributable to nutrient pollution. In 2015, experienced an intensive bloom of cyanobacteria that triggered a drastic change its ecosystem. Our analyses indicate phytoplankton 2016-2021 did not present seasonal variability pattern; community was mainly dominated by diatoms and punctually reached abundance peaks above 107 cell L-1 along with chlorophyll concentrations exceeding 20 μg L-1. predominant diatom genera during these blooms were different as well conditions under which they produced. These high abundances are unprecedented lagoon; fact, our data taxonomic composition, time variation patterns differ notably comparison published before 2015. Consequently, results support finding trophic status changed profoundly.
Language: Английский
Citations
10
Scientific Reports, Journal Year: 2023, Volume and Issue: 13(1)
Published: July 21, 2023
Abstract The frequency and severity of extreme events related to climate change have intensified worldwide in the last decades. It is documented that increasing rainfall flooding cause more nutrient runoff into waterbodies, initiating numerous harmful algal bloom (HAB) events, especially fragile ecosystems. We analyze dramatic economic damage one these episodes Mar Menor, largest salt-water lagoon Europe. show when public perceived environmental degradation, return on housing investment was 43% lower surroundings than similar neighboring zones 6 years after HAB (2015). This represents a loss wealth 4000 million euros, around ten times gains changing from dry-farming irrigated crops, which makes this ecosystem fragile. Hence, we quantify some consequences ecological deterioration linked Global Climate Change.
Language: Английский
Citations
10
Ecological Informatics, Journal Year: 2024, Volume and Issue: 81, P. 102554 - 102554
Published: March 12, 2024
Ocean monitoring systems are designed for continuous of the seas and oceans to track their evolution thus anticipate environmental issues. However, they often based on Internet Things (IoT) that expensive, hard maintain, offer little spatial coverage. An emerging alternative is Satellite Remote Sensing (SRS) good geographical coverage but, as a reliable real-time system, also face several challenges such conditions, spatio-temporal granularity, terrain oleography, etc. This paper introduces an easy-to-use software tool crawl water-quality data from up 6 satellite instruments (i.e. Sentinel 3 A, 3B, NOAA VIIRS, SNPP Aqua MODIS, Terra MODIS) European Space Agency's (ESA) Coopernicus system NASA's Marine Environmental Monitoring Service. We provide in-depth analysis in terms reliability chlorophyll-a (Chl-a) highly anthropised local/regional context like Mar Menor lagoon (Murcia, Spain), where serious socio-environmental issues arising due eutrophication process. Our results show linear correlation between situ data, obtained by Spanish public institutions since 2016, generated IRTM-NN (Inverse Radiative Transfer Model-Neural Network) algorithm general, reaching coefficient values close 0.9. They organic matter inputs ephemeral streams relevant determining Chl-a concentrations. Moreover, temporal using single instrument rather limited, no were recorded 80% days studied. figure decreases 30% when combined, increasing granularity measurements approximately 5 1.5 days, suggesting need combination these robust SRS system.
Language: Английский
Citations
3
Limnetica, Journal Year: 2022, Volume and Issue: 41(2), P. 1 - 1
Published: Feb. 9, 2022
Mar Menor is a Mediterranean Coastal lagoon with high environmental and social value, but has suffered important episodes of contamination in recent years due to heavy rains, sediment dragging polluting substances mainly from agriculture as well the entry mining waste, causing an increase eutrophication. Water quality variables such chlorophyll-a concentration [Chl-a] turbidity, can be studied through its optical properties by remote sensing techniques. In this work, methodology proposed for monitoring turbidity using Sentinel-2 images. For purpose, extensive database both was used consisting data taken on different dates between 2016 2019 at 12 points Menor. The images were atmospherically corrected Case 2 Regional Coast Color Processor (C2RCC) version turbid waters (C2X) obtain water surface reflectance. Then several arithmetic relations reflectance bands bibliography analyzed. Comparing results each one these situ data, decided that best index estimation relation (R560 + R705)/ R665) RMSE = 2.6 mg/m3 NRMSE 9.1 % R705*R705/R490 1.5 NTU NRMSE= 10.9 %. Finally, applying relationships dates, thematic maps obtained. One some days after September torrential which considerable observed
Language: Английский
Citations
15
Remote Sensing, Journal Year: 2020, Volume and Issue: 12(12), P. 2042 - 2042
Published: June 25, 2020
This study presents the results of geoenvironmental characterization La Matildes riverbed, affected by mine tailings in Cartagena–La Unión district, Murcia (southeast Spain). Soils and riverbeds this area are highly polluted. Two Electrical Resistivity Imaging (ERI) profiles were carried out to obtain information about thickness deposits their internal structure. For Murla, a tributary El Miedo geophysical method imaged two different units: upper one characterized low resistivity values 5–8 m thickness, correlated with deposits; lower more resistive unit corresponding Paleozoic metasediments bedrock. The ERI profile transverse Las dry riverbed revealed existence three units. uppermost has lowest corresponds discharged riverbeds. An intermediate unit, values, sediments before mining operations. is Significant amounts pyrite, sphalerite, galena found both sediments. geochemical composition borehole samples from materials shows significantly high contents As, Cd, Cu, Fe, Pb, Zn being released environment. Mining works have modified natural landscape near town. Surface extraction open-pit mines changed summits Sierra de Unión. Rock metallurgical wastes altered drainage pattern buried headwaters ephemeral channels. environmental hazards require remediation minimize impact on Mar Menor coastal lagoon, most touristic areas SE Spain.
Language: Английский
Citations
21
Chemosphere, Journal Year: 2021, Volume and Issue: 286, P. 131588 - 131588
Published: July 17, 2021
Language: Английский
Citations
18